let's bring in chief political correspondent candy crowley and john king. in 2008, barack obama, hillary clinton were bitter enemies battling a tough primary season. now fast forward, they're doing this high-profile joint interview. what do you make of how their relationship has evolved? >> i think it evolves out of political necessity. it's a very powerful force in politics. and it is not the first time that rivals have ended up being friends sort of. >> are they friends? >> well, look, have they been to the white house for dinner? we're told not. >> see, i find it amazing. >> she owes him a lot and he owes them a lot. there was the bushes and the doles and the reagans, and they all didn't get along for a while. and then the political expediency, political necessity chimed in. do i think that they seem to have come up with a relationship that looks at least on the surface like a good one beyond just a good working relationship? it certainly looks like it. and let's remember, hillary clinton's been through a whole lot worse than getting defeated by presiden